Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cua tre » cuu tre, cua triet, dua tren
nang xa » nang x, lang xa, nang ma
hau luc » hau loc, nhan luc, hieu luc
hanh le » thanh le, hanh ve, hanh de
cau luc » cau truc, cau phuc
cua te » cua tu
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach v nang xa hoi. hieu van ((hau luc) or (cau luc)) van hanh le ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang xa hoi. hieu van ((hau luc) OR (cau luc)) van hanh le ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. hieu van ((hau luc) or (cau luc)) van hanh le ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. hieu van ((hau luc) or (cau luc)) van hanh le ((cua tre) OR (cua te))*.